US2781722A

US2781722A - Type group and type selecting means for wheel printers

Info

Publication number: US2781722A
Application number: US505866A
Authority: US
Inventors: Donald H Apgar
Original assignee: International Business Machines Corp
Current assignee: International Business Machines Corp
Priority date: 1955-05-04
Filing date: 1955-05-04
Publication date: 1957-02-19
Anticipated expiration: 1974-02-19
Also published as: BE547521A; NL206791A; CH338632A

Description

I Feb. 19, 1957 APGAR 2,781,722

TYPE GROUP AND TYPE SELECTING MEANS FOR WHEEL PRINTERS 3 Sheets-Sheet 1 Filed May 4. 1955 L- INVENTOR.

DONALD H. APGAR ATTORNEY Feb. 19, 1957 D. H. APGAR TYPE GROUP AND TYPE SELECTING MEANS FOR WHEEL PRINTERS 3 Sheets-Sheet 2 Filed May 4, 1955 DONALD H. APGAR ATTORNEY D. H. APGAR Feb. 19, 1957 TYPE GROUP AND TYPE SELECTING MEANS FOR WHEEL PRINTERS Filed May 4, 1955 3 Sheets-Sheet 3 240 51F200 mzoN INVENTOR.

DONALD H APGAR ATTORNEY t 246 wziokmwm printing wheel.

United States Patent TYPE GROUP ,AND TYPE SELECTING MEANS FOR WHEEL PRINTERS Donald H. Apgar, Binghamton, N. Y., assignor to International Business Machines Corporation, New York, N. Y., acorporation 'of'New York Application May 4, 1955, Serial No.;5,05,866

6 Claims. (Cl. 10193) This invention relates to wheel printing mechanisms in general and more particularly to the type wherein position to unlatch alower pull rodwhich controls the type group selecting clutch to initiate rotation of the Thefour analyzer slides are under control of four analyzer cams which have such formations that the lower pull'rod is only 1unlatched at a delayed time in the cycle. This delay in engagement of the type group selecting clutch occurs for single holes 9-1 and combinational holes'8-4, 8-3.

Itis evident by recourse tothis patent that the above described analyzer storage mechanism 'is a complicated structure although it serves its purpose well from the view-point of elficiency and operation. I

It is then the main object of-the invention to provide a type group selecting mechanism which is simpler than that heretofore devised, andoperates as efiiciently. The simplification not only reduces the cost of manufacture but cost in the'reguirement for service and adjustment when needed.

According to the present invention a clutch release arm for a single revolution delay clutch-isengaged at differential times as aresu'lt of the energization of a print control magnet in accordance with the holes 9-1 and said delay clutch is provided with a cam disk-having a cam portion effective as the clutch terminates its rotation and in delayed points in the cycleto actuate a clutch release arm of the type group printing wheel clutch to select groups of type associated with theholes 9--1.

Another object, according to the invention,,is to devise such cam disk with two other cam portions which, as

a result of an. engagement of. the delay clutch when, an

8 holeis analyzed, causes'the clutch release armvto be actuated at either the a or 4 card hole impulse time to therebycause the type group selecting clutch to select type groups allocated to 8-3 or. 8-4combinational holes.

This'arrangement. is especially useful in printing mechanisms of the type shownin the patent Wh6Ifei8-30l 8 4 combinational holes' select two. extra groups of 0, X, R holes are analyzed. to select a group of type ,allocatedtoeonly t), .X, R holes, :and to prevent the p The four analyzer slides are adapted when in a, certain Patented Feb. 19, 1957 control magnet from operating the delay clutch when 9-1 holes are analyzed. j

Astill further object is to devise the above described construction in such manner that it is capable of being incorporated in commercial 407 Accounting Machines marketed by thelnternational Business Machines Corporation and shown in the aforesaidU. S. Patent No.

2,438,071, without changes in the timing of the machine.

A still further object is to provide an interlock in the form'of-a cam which-prevents the actuation of said clutch release armfor said delay clutch when 0, X, R' holes are being analyzed, andto release said clutch release arm for actuation by said print control magnet upon its energization by the 9-1 holes.

Other objects of the invention will be pointed out in I the following description and claims and illustrated in the accompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, which has been contemplated, of applying that principle.

In the drawings:

Figs. la and 1b when assembled in this order comprise a transverse sectional view through the machine showing the construction of the improved alpha-numeric punctuation and symbol printing mechanism.

Fig. 2 is a diagram showing in the outer circle the type on the printing wheel as they .are arranged in' groups, the next inner circle showing the particular 0, X, Rzone holes or N pulse which select the type in each group, andthe innermost circlethe particular card holes which either singly or in combination select the groups er type.

, Fig. 13 is a timing diagram of.the machine.

The present improvements are directed to a simplification of the means for selecting a group .oftype and a desired type in a' selected groupdisclosed in the patent to R. E. Page et al. No. 2,438,071.

As shown inthis patent,.and herein the type wheel 45 (see Fig. 2) carrying 48 type is provided withall of ,thedigit type 09,.a complete set of alphabetic characters,

and a series of punctuation characters and symbols. Each group of type consists of fourtype, grouped as diagrammatically shown in Fig. 2. 7

' scribed, if; anumeral type is to be selected forprinting,

the printingimpression will be taken at the N point in the machine cycle, which point is after the R index point position (see .Fig. 3 for timing of the N impulse).

The alphabet type of the selected group are selected by the 0, X and R zone holes. For example, ifvthe hole should be at the 2position and no zone hole is present, the digit 2 willbe printed. If a zone hole is at the 0 index point, such hole will select the type S; if at.the

index point typeKwill be selected, and if at the R index point position type .B will be selected.

More specifically, ifthe holeis atthe 2 index point position alone, a'printing wheel 45 (Fig, lb) will be rotatedcounterclockwise until the Zffltype is at the fprintingjline, and then the printing wheel 45 will be rocked asa result of the pulseto effect printing from the 2 type. It ,will be noted that if a zone hole is at the R posit ions,.thenundercontrolof the R zonehole the printing wheel 45 will be rocked earlier than for printing the digit 2,,t -o take animprint from theB type. The zone hole at the .X position will cause the printing wheel 45 to be rockedstill earlier to take an-imprint from theK typepandeazonehole at theO, index point positionstill earlier,to;,print,from the S type.

The same principle of operation is provided for selecting the numeral and alphabet type of other groups.

Also as in U. S. Patent No. 2,438,071, there are three groups of punctuation and symbol type, one group being selected by combinational holes 8-3, another by combinational holes 8-4, the particular type in each group being selected by 0, X, R zone holes, or the N pulse in the absence of such zone holes.

In the absence of any card holes at 1-9, 8-3, 84, the N pulse alone will select one punctuation type, and 0, X, R zone holes willselect the other two punctuation type, and zone hole alone the 0 numeral type.

As is well known, the card is fed past suitable analyzing mechanism to analyze the index points in the

order

9, 8, 7, 6, 5, 4, 3, 2, l, 0, X and R. When an analyzing brush senses a hole by circuits shown in U. S. Patent No. 2,438,071 in any of the above index point positions in a column, a circuit is closed to a printing control magnet 10 (Fig. 1a), and for each card column there is a printing control magnet 10.

When a magnet 10 is energized it attracts its related armature 11 against the force of a return spring 12 so that a lug 13 at the extremity of armature 11 is removed from a shoulder 14 of a related link 16 which is suitably guided for a reciprocating movement. When the link 16 is unlatched by removal of lug 13 from shoulder 14 a compression spring 15 fitting in a spring support and guide block for link 16 urges link 16 to the left, and when such spring 15 is effective for action under control of a cam 17, it serves at times as a source of a mechanical impulse transmitted to link 16 to rock a

clutch release arm

59, 60, 61 to cause type group selection.

Pivoted on a rod 18 is a follower arm 19 having its rounded end received by a semi-circular notch 20 in a related link 16, said follower arm 19 thus being connected to link 16 is also urged by spring 15 to cooperate with cam 17. Said cam 17 is provided with a series of notches 17a, one for each index point analyzed and also for the N pulse. Said notches 17a are each registered with the follower extension 22 of follower arm 19 shortly after the index points on the card are analyzed. Thereupon, spring 15 is effective, if magnet 10 is energized, to cause projection 22 of arm 19 to enter a notch 17a, rock arm 19 counterclockwise to shift rod 16 to the left to rock the

clutch release arm

59, 60, 61 to engage a delay clutch in a manner to be presently described. Thereafter, inclined portion 17b of each notch cams follower arm 19 and pull rod 16 to the right to enable the pull rod 16 to be relatched by the now restored armature 11 of the deenergized magnet 10. Said cam 17 is, with the exception of its timing and formation of notches, substantially like earn 125 of Patent No. 2,438,071. In said patent thetiming of cam 125 enables it to function as a delay cam, whereas in the present arrangement it is timed to be effective on the pull rod 16 substantially synchronously with the card impulses transmitted to magnet 10. Cam'17 is similarly driven by a shaft 153, as in said patented machine.

Diverting for the present to the construction of the printing mechanism there is also provided in the present machine a shaft 29 (Fig. 1b) which is fluted transversely around its periphery to provide clutch notches 30. Shaft 29 carries a plurality of gears 31, there being one gear 31 for each order of the. printing mechanism; the series of gears 31 loosely encircling the periphery of the drive shaft 29. To provide for thenecessary lateral spacing between the gears 31 the gears are guided by guide slots 32 formed in guide bars 33 and 34. By such spacing members the gears 31 are separated to allow independentrotation and to also locate a clutch pawl 36 which is pivoted by a stud 37 on the related gear 31 to cooperate with a related clutch release arm 40 pivoted on a rod 41. The clutch release arm 40 normally holds the clutch pawl 36 in such position that its tooth 42 is held out of engagement with any of the clutch notches of the shaft 29. When the clutch release-arm is rocked counterclockwise at a difierential time, as the result of its operation by the delay clutch, the type group selecting clutch is engaged because a spring 44 attached to clutch pawl 36 will rock the latter to cause the clutch toot-h 42 to engage a particular clutch notch 30 determined by the differential time the clutch release arm 40 is operated by the delay clutch. The above described clutch is the type group selecting clutch and causes the difierential rotation of the printing wheel 45 since the gear 31 and printing type of the associated type carrying wheel 45 are intergeared.

Each printing wheel 45 is carried by an arm 46 loosely pivoted on a rod 43 which is provided with a follower extension 47 which is engaged by a cam projection 48 of a cam disk 49 which is the print cam and constitutes a driven member of a printing clutch.

Pigs. in and lb show the arrangement of the printing devices for a single order and the machine is preferably provided with duplicate devices for printing a plurality of printing characters.

The construction and operation of the delay clutch which constitutes part of the present invention to select groups of type in accordance with the index point posi' tions 9-l analyzed will now be described.

The delay clutches, of which there is also one for each order, are driven by a reamer shaft 50 which is slotted transversely to provide a series of clutch notches 51. Encircling the periphery of the shaft 50 is a cam disk 52, there being one cam disk for each printing order. To provide for the lateral spacing between the plurality of cam disks and the parts carried thereby said cam disks ,52 are guided by fitting in slots 53 formed in a plurality of comb guide blocks 54. By such spacing the cam disks 52 are separated to allow independent rotation and to also locate a clutch pawl 55 which is pivoted on a stud 56 on the cam disk so that its extremity is in the plane of and normally engaged by a hook portion 57 of a triple arm clutch release member consisting of

arms

59, 60 and 61. The clutch pawl 55 is provided with a clutch tooth 63 adapted to engage one of the clutch notches 51 dependent upon the time that the delay clutch is engaged and corresponding to the time that the first impulse is directed to the print control magnet 10. The pull rod 16 is provided with a depending shoulder 65 abutting the upper end of the arm 59, it being obvious that when the pull rod 16 is moved to the left as a result of the unlatching by armature 11 of an energized magnet 10 and the position of cam 17 as previously described, the movement of the shoulder65 away from the arm 59 will enable aspring 66 to rock the triple arm clutch release member ,59, 60, 61 counterclockwise so that the hook 57 of the arm 60 will be disengaged from the clutch pawl 55. A clutch pawl operating spring 63 will then be effective to rock the clutch pawl 55 to engage the clutch tooth 63 with one of the notches 51, the par ticular one which is'engaged being dependent upon the time that the magnet 10 is energized (see Fig. 3). The timing conditions and delays in each clutch engagement are such that a digit impulse will cause the engagement of the clutch just prior to the time of the suceeding card impulse. Reamer shaft 50 may be driven by the operating mechanism shown in the Page Patent No. 2,438,071 by any suitable gear drive mechanism so that it rotates two revolutions per cycleand synchronously with the other operating parts of the machine.

Each cam disk 52 is provided with a cam" edge 70 (Fig. 1a) which, in the clockwise rotation of cam disk 52, is sufficiently high to strike a follower roller 71 of a follower arm 72 pivoted on a stud 73 and rock said follower arm. During 90 rotation of a cam disk 52 (see Fig. 3), roller 71 will rest against a concentric high portion 75 of the cam disk, after which time roller 71 will drop to a slightly lower concentric portion 76 being urged to do so by a spring 77 acting upon the follower arm 72. At this time a projection 80 of the follower arm 72 will engage a shoulderfil of atriple arm member 82 to-hold the'follower arm 72 against'further clockwisemovement. For the present member 82 may be regarded as a-stop to hold follower arm 72 from being rocked clockwise any further, due to still lower cam portions'105 and 109 which are presented to the roller 71 in the'further clockwise rotationofcamdisk S2. Cam edge 70 will ultimately engage the roller 71 of the follower arm 72, rocking it counterclockwise against the action of the spring 77. In this counterclockwise movement a foot 83 of follower arm 72 will actagainst a cam edge 84 of an extension of clutch release arm 40, thereby rocking the clutch release arm-40 counterclockwise to disengage it from the clutch pawl 36 of the type group selecting clutch. This causes an engagement of thetype group selecting clutch and the initiation of rotation of printing wheel to select a desired group of type.

The time that the printing wheel clutch is engaged in the manner just described is dependent uponthe time that the delay clutch is engaged andthus the time the magto the 8 card hole impulse so that clutch tooth 63 will engage the 9 notch 51 of clutch drive shaft 50. The cam disk 52 will then be rotated clockwise until cam edge 70 striking roller 71 rocks clutch release arm 40 to cause the engagement of the type group selecting clutchat about 138 of the operating cycle. type group selecting clutch at this timewill cause printing wheel 45 to rotate counterclockwise exactly as. in Patent No. 2,438,071 the extent of ten groups of typeto successively'present the

characters

2, 11, I and 9 of the group selected by the 9 hole '(see Fig. 2) to the printing line between 300-'345. The differential time that cam disk 52 causes the engagement of the type group selecting clutch determines the extent of counterclockwise rotation of the printing wheel 45 to select a-group of type for printing between 300-345. mined extent of rotation of theprinting wheel 45 has beeneifected and after the printing impression has been made, with the type group selecting clutch still engaged, the printing wheel 45 will continue to rotate until the end of the clutch pawl 36 (Fig. 112;), strikes clutch arm h"; which, in the meantime, hasbeen brought s norrnar' position by means of a compression spring J. When such disengagement is effected the printing wheel 45 is inthe normal position shown in Fig. 1b and diagrammatically in Fig. 2. In the same manner, after the cam disk 532 has rocked clutch release arm 40, it will continue to rotate clockwise .until the free end of the clutch pawl 55 engages the'hook 57 of the arm '60 to disengage the clutch tooth 63 from the notch 51 it engaged. When such disengagement iseifected the delay clutch will be in the normal position shown inFig. 10.

manner the-extent of counterclockwise rotation offthe.

Engagement of the After the predeterprinting wheel is still further decreased to the extent of proportionally lesser groups-of type when the card holes 7, 6, 5, 4, 3, 2 and l are analyzed becauseof the later times thatthe delay clutch is engaged. -Howeve'r in eachflinstance after the type of selected group are presaid printing wheelto bebroughtbackto the normal-posi- :6 tion-shownin Figs. 1b and'4, at the end of the operating cycle.

From whatrhas been described and is evident in Fig. 2 the digit holes 9-1 select the, desired group of nine diiferent groups of types, each consisting of four type. The ,particularpalphabet type in theselected group from which printing is to beeflected is selected by the 0, X and R zone holes and in the absence thereof the transmission of an N:impulse to print from the numeral type. Thus, thetime in the machine cycle that actual printing occurs, is fixed according to zones. The sens.- ing of a 0 zone'hole will cause printing at 300 in the cycle; a hole at X will cause printing at 315 and a hole at ',R at 330 andin the absencethereof a-machine impulse at the N time, transmittedby circuits shown in Patent No. 2,438,071 willeiiectprintingat 345 from the numeral type of the selected group. Each of these pulsesconsists of a second impulse transmitted to the magnet 10 and by mechanism which is substantially ,the same as in the U. SuPatent No. 2,438,071the print clutch is engaged at a-dilferential time to rock the printing wheel 45 to print from the selected type. For this reason this mechanism will only be generallydescribed herein.

The second energization vof the magnet 10 upon analysis of the O, X, Rholes or the transmissionof the N impulse attracts its armature 11 to unlatch. the link 16 in the-mannerpreviously described and under control of. the notches 17a in cam 17 designated 0, X, R and N1 .said link 16 is moved to the left by the action of spring 15. At the upper extremity of link 16 there is provided an upturned finger 85. (,Fig. .la) engaging :1 depending ex-tensioni86 of an arm.'87. .As a result of'this second movement of link 16 arm 87 is rocked clockwiseto register a notch 126 vtherein with a depending extension 127 of the clutch release .arrn88. 'The latter is now rocked by a spring 189 to nnlatch. a clutchpawl 90. At

this time .a ,low; portionc of.;a cam 120 (similar to cam 137 of Patent No. 2,438,071) cooperate with cam 'followerextension'121 so as not to restrain the rocking of the clutch'release arm 88.

projection 48 will strike the extension 47 of the arm 45 on which is pivoted'the'printing wheel 45 and thereby rock said printing wheel against the usual platen at the time the selected type is at the printing line to effect the printingimpression.

It is explained-that shaft, 29 shown in the timing diagram is-slowed down between300345 by mechanism shown'inPatent No. 2,438,071 which is at the times that'the cam projection 43 engages extension 47 so that during such slowed-down rotation of the print wheel'45 printing may be effected from theselected type in accordance with thepresence of 0, Xfand R holes or in the absence thereof the N machine impulse.

During the time that the second impulses are transmitted to the magnet 10 at 0, X, R and N times the arm 61 cooperates with the high portionltltla of cam 100, holding the

triple arm member

59, 60 and 61in the .normal' position so that hook .53 will notfbe disengaged 'flOlIlnIhfi clutch ;pawl 55. .'Hence, .the transmission of Fig. 3.

Selection oftype groups under control of combinational holes 8-4 and 8-3 ,From the diagramof Big. 2 it willbe seen that there 7 are two groups of symbol and punctuation characters selected by the combinational holes 8-3 and 84.' The manner in which the delay clutch selects such groups of characters as a result of combinations of impulses will now be explained.

When a card column is perforated with either the 83 or 8-4 holes the 8 impulse which is analyzed first is transmitted to magnet at the 8 impulse time to energize said magnet and under control of the notch 17a of cam 17 designated 8 link 16 will move to the left to cause the engagement of the delay clutch precisely in the manner previously described. This initiation of rotation of cam disk 52 would normally cause the cam edge 70 of cam disk 52 to effect the engagement of the type group selecting clutch except that a second hole at the 4 or 3 position will prevent such normal operation. Assuming now that a card column has an additional hole at the 4 index point position magnet 10 is again energized. Cam disk 52 which has been initiated in rotation by the 8 hole will present a notch 105 shortly after the 4 impulse to register with the cam follower roller 71. The second energization of magnet 10 at the 4 impulse time will again unlatch link 16 which moves to the left under control of the notch 17a of cam 17 designated 4. Removal of shoulder 65 from arm 59 permits spring 66 to rock the

triple arm

59, 60, 61 counterclockwise, it being noted that at this time arm 61 is over the low dwell 10% of cam 100 as is the case for 9-1 impulses. Arm 60 which is beneath an arm 106 of the stop member 82 rocks said stop member 82 clockwise to move shoulder 81 downwardly away from the projection 80 of the follower arm 72 to release the follower arm. Spring 77 is now efiective to rock follower arm 72 clockwise to cause follower roller 72 to ride off a cam edge 76 (see Fig. 3) and drop into notch 105. Extension 83 of the follower arm 72 will coact with a cam edge 107 of the clutch release arm 40, rocking the latter counterclockwise to unlatch clutch pawl 36 and engage the type group selecting clutch.

From the timing diagram of Fig. 3 it will be seen that the type group selecting clutch will be engaged at about 105 much earlier in the cycle than if the 8 hole alone was present in the card column. This earlier engagement of the type group selecting clutch causes the rotation of the printing wheel 45 to the extent of twelve group of type to present four different symbols successively to the printing line. After the selection and printing of the desired type which is determined by the 0, X, R hole or the N impulse in the manner previously described, the printing wheel is rotated complementally back to its normal position shown in Fig. lb.

After the engagement of the type group selecting clutch the cam edge demarcating notch 105 will engage the follower roller 71 to rock the follower arm 72 back to normal position where it will be held in this position by the normal position of stop member 81. Previously cam edge 17b demarcating the 4 notch 17a of restoring cam 17 will relatch link 16, rock

clutch release arm

59, 60, 61 to normal to permit the stop arm 82 to assume its normal position as a result of the action of a restoring spring 108.

Clutch release member

59, 60, 61 now assumes its normal position and hook 57 will be in position to engage the clutch pawl 55 to effect the disengagement of the delay clutch, thereby bringing all of the parts thereof to the normal position shown in Fig. la.

Upon occurrence of the combinational holes 8-3 the delay clutch will be engaged at the 8 time as previously explained but at the time the second 3 impulse is directed to the magnet 10 a second dwell 109 of cam disk 52 will be registered with the follower roller 71 so that upon the second rocking of the

triple arm member

59, 60, 61 stop member 82 will be rocked to unlatch the follower arm 72 which enters the notch 109. In the manner explained for the 8-4 combinational holes this will cause the en- 1 8 gagement of the type group selecting clutch, thereby initiating rotation of the printing wheel at 120 to cause a lesser rotation of the printing wheel than for the 84 combination and to the extent of eleven groups of type. This extent of rotation of the printing wheel 45 will select a group of four punctuation and symbol type. The presence of the 0, X or R zone holes in the card column or an N impulse will determine which of the four type will be printed from.

Attention is directed to the provision of a foot 110 (Fig. la) on link 16 which is in the plane of an extension 111 of arm 72. When link 16 moves to the left as a result of projection 22 entering the notch 17a designated 4, foot 110 abuts, extension 111 to hold arm 72. Cam edge 17b of notch 17a designated 4 then earns link 16 to the right to be relatched and foot 110 is now in the normal position (Fig. la). This releases arm 72 for free movement to enable roller 72 to drop to a lower portion 76 (see 'Fig. 3) then as cam 52 rotates a little further counterclockwise drop further to enter the notch 105.

When combinational holes 8-3 occur in a column the projection 22 enters the notch 17a designated 3 but foot 110 of link 16 engaging the extension 111 of arm 72 will hold arm 72 .to prevent its roller 71 from dropping into the notch 105, effective for 8-4 combinational holes. Thus, improper printing of the group of characters selected by 8-4 holes is effectively prevented.

Notch 17b designated 3 is wider than the other notches 17b, as is best seen in Fig. 3. After cam 52 is rotated counterclockwise to the point where roller 71 is not registered with the notch but rests upon a cam edge 112, the restoring cam edge 17]; of notch 17a designated 3 will be effective to relatch link 16 to move foot away from the extension 111. This releases arm 72 for free movement to enter the notch 109 as rotation of cam disk continues counterclockwise, and as a result of entering notch 109 the type group selecting clutch is engaged as previously described to select the group of type for combinational holes 8-3.

Selection of type by zone holes only From the code of Fig. 2 it will be seen that there is a group of symbol and punctuation type which are selected by the transmission of an N impulse in the absence of any of the digit impulses 1-9 or 8-3 and 8-4. This N impulse is a machine impulse (in contradistinction to a card hole impulse) which is transmitted by circuits shown in U. S. Patent No. 2,438,071 at about 187 (Fig. 3) when in the present arrangement when arm 61 is riding on the high dwell 100:: of cam 100. This obviously prevents rocking of the triple arm

clutch release member

59, 60, 61 and the engagement of the delay clutch. The transmission of the N machine impulse to a magnet 10 will attract its armature 11 to unlatch the link 16. Follower projection 22 will then drop to the lower dwell N1 of cam 17 enabling link 16 to move to the left suflicieutly to cause foot 110 to rest against the extension 111 of arm 72. Thereafter, under control of a still lower dwell portion N2 of the restoring cam 17 link 16 is moved at about 278 in the cycle still further to the left by the action of the spring 15 and in this case a sufiicient extent so that said foot 110 of the link 16 will rock the follower arm 72, counterclockwise against the action of its spring 77 and movement of extension '83 of arm 72 against the cam edge 84 will rock the clutch release arm 40 counterclockwise, thereby causing engagement of the type group selecting clutch at about 300 in the machine cycle. This will cause the rotation of the printing wheel 45 to present a group of symbol and punctuation type successively to the printing line. The type in the zone only group were selected by the 0, X and R holes as previously described, or in their absence by the N machine impulse which is precisely as fully described in U. S. Patent No. 2,438,071.

While there have been shown and described and pointed out the fundamental novel features of the invention, it

eyzsirma will be understood thatva-rious omissions and substitutions and changes in the 'form;and detailsof-the device illustrated and in its operation may be made by those skilled in the art, without. departing from .the. spiritofihe invention. It is the-intention, therefore, to be limited only as indicated by the scope ofthe following claims.

What is claimed is: 4

1. In a machine controlled .by records .of the type having holes at one position to select a first .group oftype and at another position for selecting-another group of type but includingsaid one position,.-a';rotatable,printing wheel carrying said groups ofrtypegmeans for analyzing said records, a clutch wadap-tedupon its engagement to rotate saidprinting wheelzto select either. of said groups oftype, means for releasinglsa-id clutch for engagement, a supplemental clutch ,for 'controllingsaid clutch releasing means, a cam disk rotated by .saidysupplemental clutch, a print control magnet ,for controlling said supplemental clutch, means under control ,Of ;said.-analyzing; means v.for transmitting dilferentially timed electrical impulsesto energize said print control magnet once in accordance with the hole at saiduone position,:andaa secondtime; forthe hole at the other position, means under control of said print control magnetwhen 'ene-rgized' by said one impulse to cause at the time the one impulse istransmitted the engagement of said supplemental clutchand the initiation of the rotation of said cam -disk, mea-ns comprising a cam portion of saiddisk to actuate said clutch releasingmeans at another different time haying a definite delayed time relationship to the time the supplemental clutch is engaged, to cause said first named clutch to be engaged to effect the rotation of said printing wheel to select said first group of type, a supplemental cam portion of said cam disk, and means controlled by said supplemental cam portion and said print control magnet when energized the second time after the initiation of the rotation of the cam disk to cause the actuation of said clutch releasing means at a still difierent time having a definite delayed time relationship to the time the supplemental clutch is engaged to engage said first named clutch to select said other group of type.

2. In a machine controlled by records of the type having holes at different positions, and positions 0, X, R, a rotatable printing wheel carrying groups of type; one group of which is selected by one hole, and another group is selected by said one hole and another hole at a different position, impression effecting means for taking an imprint from the type on said printing wheel, means for analyzing said records, a clutch adapted upon its engagement to rotate said printing wheel, means for releasing said clutch for engagement, a supplemental clutch for controlling said clutch releasing means, a cam disk rotated by said supplemental clutch, a print control magnet for controlling said impression effecting means and said supplemental clutch, means under control of said analyzing means for transmitting electrical impulses to energize said print control magnet when said analyzing means analyzes said one hole, said other hole, and holes 0, X, R, means under control of said print control magnet when energized upon the analysis of said one hole to cause the engagement of said supplemental clutch and the initiation of the rotation of said cam disk, means comprising a cam portion of said disk to actuate said clutch releasing means to cause said first named clutch to be engaged to effect the rotation of said printing wheel to select said one group of type in accordance with said one hole, a supplemental cam portion of said cam disk, means controlled by said supplemental cam portion and by said print control magnet when energized under control of said other hole for causing'the engagement of said first named clutch to select said other group of type, means controlled by said print control magnet when energized in response to the impulse upon analysis of the 0, X, R hole to cause the operation of the impression effecting means to cause printing from the selected type of the selected group, and interlock means for preventingthe operation of the last named means when said magnet is energized to cause the engagement of said supplemental clutchand for preventing engagement of the supplemental clutch when saidmagnet is energized to cause the operation'of-the impression effecting means.

3. In a printing machine controlled by records of the type having holesat dilferentpositions, a rotatable printing wheel carrying groupsofztype, aplurality of which groups are selected by single holes,,and another group of type isselected by one of saidholes and another-hole, means for analyzing said records, a :clutch adapted .upon its engagement torotate saidprinting wheel, meansfor releasing said clutch forengagemenna supplemental clutch for controlling said :clutch releasing means, a camdisk rotated by said supplemental clutch, .a print control magnet, 'means under control of said analyzing means for energizing said'print control magnet 21 first time when one of said single holes is analyzed, and a second time whensaid other hole is :analyzed, -means under control of saidprint:controlmagnet when energized a firsttimeto cause the engagement of said'supplemental clutch and initiation ofithe rotation ofsaid cam disk, a first cam portion carried by said cam disk for actuating the clutch releasing means to cause-engagement of said first named clutch and the rotation of the printing wheel to.select.a group of type of said plurality of groups in accordancerwith said single holes: analyzed, a second cam :portion carried-"by said cam. disk, and means controllediby said second cam portion and said print control magnet when energized a second time after the initiation of rotation of said cam disk for causing the actuation of said clutch releasing means and said first named clutch to rotate said printing wheel to select said other group of type.

4. In a machine controlled by records of the type having holes at different positions, a rotatable printing wheel carrying groups of type, a plurality of which groups are selected by single holes, and a plurality of other groups of type are selected by one of said holes and either of two other holes, means for analyzing said records, a clutch adapted upon its engagement to rotate said printing wheel, means for releasing said clutch for engagement, a supplemental clutch for controlling said clutch releasing means, a cam disk rotated by said supplemental clutch, a print control magnet, means under control of said analyzing means for energizing said print control magnet a first time when one of said single holes is analyzed, and a second time when either of said other holes is analyzed, means under control of said print control magnet when energized a first time to cause the engagement of said supplemental clutch and initiation of the rotation of said cam disk, a first cam portion carried by said cam disk for actuating the clutch releasing means to cause engagement of said first named clutch and the rotation of the. printing wheel to select a group of type of said plurality of groups in accordance with said single holes analyzed, second and third cam portions carried by said cam disk, and means controlled by said second and third cam portions and said print control magnet when energized a second time after the initiation of rotation of said cam disk for causing in accordance with either of said other two holes analyzed the actuation of said clutch releasing means and said first named clutch to rotate said printing wheel to select a related group of said plurality of other groups of type.

5.111 a record controlled machine, a printing wheel, having one group of type selected by a first hole, and another of a plurality of groups selected by either of two other holes with the first hole, a type group selectingclutch for initiating rotation of said printing wheel to select groups of type, a rotatable cam disk having three cam portions each adapted to cause engagement of said type groups selecting clutch at difierent times as said cam disk is rotated and one of saidcani portions being effective after the other two cam portions are effective, record analyzing means, means controlled by 'said analyzing means for initiating the rotation of said cam disk upon analysis of the first hole in the record to cause said one of the three cam portions to be effective to engage said type group selecting clutch to select said one group of type, means to prevent either of the two other cam portions from being effective before said one cam portion is efiective, and further means controlled by said record analyzing means upon analysis of either of said two other holes to disable said preventing means and to cause either of the other two cam portions in accordance with which one of the other two holes is analyzed to be efiective to engage said type group selecting clutch to select one or the other of said plurality of other groups of type.

6. In a machine controlled by records having 1-9 and O, X, R holes, a printing wheel having one group of type selected by an 8 hole, and another of'a plurality of groups by an 8 hole with' either a 3 or 4 hole, a type group selecting clutch for initiating rotation ofsaid printing wheel to select groups of type, a rotatable cam disk having three cam portions each adapted to cause engagement of said type group selecting clutch at different times as said cam disk is rotated and one of said cam portions being effective after the other two cam portions are effective, record analyzing means, means controlled by said analyzing means for initiating the rotation of said cam disk upon analysis of the 8 hole in the record to cause one of the three cam portions to be effective to engage said type group selecting clutch to select said one group of type, means to prevent either of the two other cam portions from being efiective before said first one cam portion is effective, further means controlled by said record analyzing means upon analysis of either a 3 or 4 hole in the record to disable said preventing means and to cause either of the other two cam portions in accordance with a 3 or 4 hole to be effective to engage said type group selecting clutch to select one or the other of said plurality of groups of type; means to take an imprint from the type on said printing wheel, means controlled by said analyzing means upon analysis of the 0, X, R holes to cause said imprinting means to efiect an imprint from the selected type of the selected group, and interlock means for preventing said means under control of said analyzing means from initiating the rotation of said earn disk upon analysis of the 0, X, R holes, and for preventing said analyzing means upon analysis of the 8, 3, or 4 holes from causing said imprinting means to effect an imprint from said printing wheel.

References Cited in the file of this patent UNITED STATES PATENTS 2,157,035 Torkelson May 2, 1939 2,199,561; Fuller May 7, 1940 2,386,422 Beattie Oct. 9, 1945 2,438,071 Page Mar. 16, 1948 2,602,394 Rabenda July 8, 1952